Well, I have done some more digging around on the internet and found a
bit of information, but nothing that leads me to find the holy grail for
my setup.  It seems that I have 2 options:

1) heat a to the temperature I want b to be heated up to and then keep a
constant there until b reaches the same temperature
2) heat b to a higher temperature than I want b to be at and then let it
cool down while b heats up with the heat given off by a until eventually
both reach the same temperature

For whatever reason (maybe the wrong one) I think that the second
approach will be faster than the first, but also a lot harder to do
without some magic formula to get some ball park values to play with.

I am willing to experiment, as this should be quite fun to do just like
physics class in high school (I never got to go to college).  But before
I embark on a fun filled Saturday, are there any other ways to do this
(better or worse)?

Thanks.


-Mario

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of Olin Lathrop
Sent: Wednesday, January 11, 2006 5:38 PM
To: Microcontroller discussion list - Public.
Subject: Re: [OT] Need help with some thermodynamics concepts (or source
of it)


Mario Mendes Jr. wrote:
> But, what I am trying to find out is the rate of change for a if b is 
> at 15 and it needs to be at 30 in 30 minutes.  So b will need to heat 
> up at 0.5 degree per minute, but what is the rate of change for a in 
> order to accomplish this?

That depends on the thermal insulation between A and B.  This will be
hard to calculate up front.  At best you can get a ballpark idea.  The
only real way to determine this is to build it and measure the result.
The flow and amount of agitation in both liquids will also have a lot to
do with it.


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